- DailyPay
- Dallas Legal Hospice
- Dana Farber Cancer Institute
- Dana-Farber Cancer Institute
- Dare County Home Health & Hospice
- Dartmouth Cancer Center
- Dartmouth Health
- Dartmouth Hitchcock Medical Center and Clinics
- David and Lura Lovell Foundation
- David Geffen School of Medicine at UCLA
- DaVita Healthcare Partners
- Day City Hospice
- DayNew
- Death Over Dinner
- Deathwives
- Decatur Memorial Hospital
- Decipher Health Strategies
- Declaration Partners
- Deerfield Management
- Deerfield Management Co.